"Give them the chance to find that out before we start giving them complexity into what the gameplay modes are going to be."

Weerasuriya added that the idea of multiplayer is "in the back of every designer's mind", and that "in the future" he's sure there will be room for such external modes.

"It's always like, 'We could do this'," he explained. "And it's great, we're always writing it down on paper, we're always keeping them relevant, but we always tell everyone, 'Hey guys, remember this is core, this is what we want'.

"We have space for that. We will have space for that, I'm sure, in the future, but is it something we want to do right now? No, absolutely not."

Announced at E3 2013, the Ready at Dawn-developed shooter offers a "unique vision of Victorian-era London" where agents of an ancient order fight a powerful foe.

It will feature historical figures and authentic locations, but will take advantage of modern technology and weapons.